Slide angle meters



Dec. 30, 1969 w E. KLAUBl-:RG

SLIDE ANGLE METERS Filed Feb. 27, 1967 FIG. 4

SIDE b llllllll INVENTOR.

WALTER E. KLAUBERG FIG. l

Unite States Patent 3,436,232 SLIDE ANGLE METERS Walter E. Klauberg, 302 E. Rogers, Houston, Tex. 77022 Filed Feb. 27, 1967, Ser. No. 623,500 Int. Cl. 601e 2] /2U; G0113 5/24; G09b 29/10 US. Cl. 33--1 2 Claims ABSTRACT @E THE DISCLSURE The subject of this invention is `a slide angle meter, comprising at least three identical and interchangeable side units so designed that when coupled together will automatically register all side lengths and angles therebetween, for each setting of the instrument. The said side unit or basic element of this invention is a device so designed for maximum simplicity that only two integral parts are required to complete it. The main integral part of said side unit consists of an elongated straight-edge ruler with slidable trackway along the face thereof and formed at one end thereof with a protractor extension in tegral therewith and tted with the secondary integral part, namely a disc which is revolvably tted within the recessed Ibase of said protractor extension, and said disc being formed on its underside with means for slidable engagement with the correlated trackway of an adjoining main side unit.

This invention relates to a new and useful slide-rule type of instrument invented and designed by the above named petitioner for the quick, accurate and automatic solution of all problems relating to triangles and to all plane tigures of the polygon type wherein side lengths and degrees of angles subtended between adjacent sides are required, and I do hereby declare the following to be a full, clear and exact description of the invention, such as will enable others, both skilled and unskilled in the solution of problems in trigonometry, navigation, land survey, artillery fine direction, and in all branches of science where straight lines and angles are interfunctional, to use the instrument for time saving, automatic solutions of said problems lwithout need of reference to any tables of trigonometric functions.

In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which:

FIG. l is an assembly view of three of the units assembled to form a triangle and it should be noted that all three of the side units are identical in size, shape, and marking; and that it is possible to similate any required polygon simply by assembling the corresponding number of identical side units; FIG. 2 is an enlarged typical view of the protractor end of a side assembly; FIG. 3, an exploded sectional view on line x-x, showing the revolvable slide connection between adjacent sides; and FIG. 4 is a sectional view on line y-y showing location of the inverted T-slot.

Referring to the drawings, the numeral 1 indicates the face of each of the identical side assemblies including ruled graduations in degrees for measurements in metric units of length, and protractor graduations in degrees for measurements of angles; 2 is the visible part of the inverted T-slot which begins at the arc of the protractor end and thence extends full length along the ruled edge of 3,485,232 Patented Dec. 30, 1969 ICC the side; 3 is the inverted T-coupler which connects adjacent side assemblies by a sliding t within the inverted T-slot 2; 4 is the revolvable support plate for the inverted T-coupler 3, and is supported within the recess area 5 by the retainer ring 6. 7 is a Vernier scale printed or engraved on the top face of the revolvable support plate 4, the ten units of the vernier scale being equal to nine of the metric units of the ruled edge of side 1, thus adding tenth digits to the last main-scale unit to pass under the vertex point of the main scale directly above it. The T-coupler 3, is precisely oifset from the protractor center to guide the ruled edge of the adjacent side directly through the vertex point through-out all possible manipulations of the instrument. Measurements of all side lengths and of all angles between adjacent sides are automatically indicated for each setting of the instrument.

Having thus fully described my invention, `what I claim as new and useful and desire to secure by Letters Patent is:

1. An instrument for measuring the lengths of sides and angles therebetween, of polygons having at least three sides, comprising:

at least three elongated members, each formed with a longitudinally extending trackway,

plate means pivotally mounted on each member adjacent one end portion thereof; slide means carried by each said plate means and shaped for slidable engagement with another of said members in the trackway thereof to rotatably connect the ymembers for angular adjustment relative to each other and to permit the position of an end portion 0f each said member to be adjusted along the length of another member, each of said members being formed adjacent said one end with a portion shaped for coaction with a straight edge portion of another of said members to indicate the angle `between slidably engaged members;

indicia means adjacent and extending longitudinally along each said trackway; and

each said plate means being interposed between the indicia means adjacent the trackway with which the slide means carried by the plate means is slidably engaged and the member on which the plate means is pivotally mounted.

2. An instrument as defined in claim 1 wherein each said slide means is laterally offset from the point of pivotal mounting of the pivotally mounted means whose rotation is prevented by said slide means.

References Cited UNITED STATES PATENTS 896,205 8/1908 Goodwin et al. 33-97 1,187,272 6/1916 Demmich 3392 1,636,637 7/1927 Hutchison 33--102 2,093,048 9/1937 Ike 33-102 X 2,244,125 6/1941 Siefker 33-98 2,720,706 10/1955 Laine.

2,73 6,096 2/1956 Greene 33-102 X WILLIAM D. MARTIN, JR., Primary Examiner U.S. Cl. X.R. 33-75, 98, 102 

